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wcdma conceptWCDMA Overview

§d Application engineer Agilent Technologies Taiwan E-mail: chih-kai_wu@agilent.com Phone:(03)495-9342 A¤ :0800-047866

Agenda
CDMA overview WCDMA overview PSA measurement solution

Wireless Technology & Services Evolution

HIGH BIT RATE SERVICES SMS, IMPROVED SPEECH DIGITAL SPEECH ANALOG SPEECH 1G ANALOG
AMPS,TACS, NMT

3G 2G+
IS-95B, NADC+, GPRS

IMT-2000 1999
W-CDMA Cdma2000 TD-SCDMA EDGE

SERVICES

2G

DIGITAL
GSM, NADC 1992 PDC

1985 INTERNATIONAL GLOBAL

LOCAL

NATIONAL

COVERAGE

The CDMA Concept
Multiple Access Method for Wireless Communication What is CDMA ? CDMA Capacity

Multiple Access Approaches
Frequency Division Multiple Access Time Division Multiple Access
1 2

N 3

Spread Spectrum Multiple Access

Code Division Multiple Access

Multiple Transmitt